Compression ratio control in reciprocating piston engines

Details Compression ratio control in reciprocating piston engines Compression ratio control in reciprocating piston engines

1988-03-21

1989-08-29

Wolfe, Willis R.

Internal-combustion engines

Four-cycle

Variable clearance

F02B 7504

Patent

active

048607029

ABSTRACT:
The object of the invention is to provide means for continuously adjusting the value of the compression ratio in Otto-cycle reciprocating piston engines, for increasing their thermal efficiency, especially at part throttle operation. Embodiment A provides means for continuously adjusting the position of the crankshaft 18 in the crankcase (30); while according to Embodiment B, the position of the connecting rod's head bearing (51) is being adjusted with respect to the cylinder heads by predetermined continuous rotation of eccentric cylinders (17) which are used to support the bearings. Means are shown for accurately meshing the crankshaft gear to the transmission gear in Embodiment A and for introducing predetermined rotational phase shifts to the eccentric cylinders in Embodiment B.

REFERENCES:
patent: 3686972 (1972-08-01), McWhorter
patent: 3861239 (1975-01-01), McWhorter
patent: 4738230 (1988-04-01), Johnson

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